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등위험곡선을 이용한 해상의 2차원 위험도 평가에 관한 연구
공성호(Seong-Ho Kong),이은방(Eun-Bang Lee) 한국항해항만학회 1998 한국항해항만학회 학술대회논문집 Vol.2 No.2
In the decision of a collision avoidance action for navigators and intelligent ships, it is necessary to evaluate the degree of surrounding risks effectively. We propose the new risk evaluation technique in two dimensions using Even Risk Contour on the basis of the concept of contour line. In this paper, we introduce the algorithms of ERC and Approach Velocity(AV) and show their applications for avoiding traffic collision at sea.
수생태계 부영양화 분석을 위한 비색법 기반의 광학식 센서 신호처리회로(ROIC)구현
구성모 ( Seong Mo Koo ),정동건 ( Dong Geon Jung ),최영찬 ( Young Chan Choi ),김경규 ( Kyung-kyoo Kim ),공성호 ( Seong Ho Kong ) 한국센서학회 2020 센서학회지 Vol.29 No.4
In this study, a read-out integrated circuit (ROIC) that can be applied to a colorimetry-based optical sensor for analyzing total phosphorus and total nitrogen was developed and characterized. The proposed ROIC minimizes the effect on temperature fluctuation, improves sensitivity, and extends the dynamic range by utilizing a dual optical path and feedback control circuit. Using a dual optical path makes it possible to calibrate the output signal of the optical sensor automatically, along with the temperature fluctuation. The calibrated voltage is fed back into the measurement stage; thus, the output current of the measurement is adaptively controlled. As a result, the sensitivity and dynamic range of the proposed ROIC are improved. Finally, a total-phosphorus analysis was conducted by utilizing the ROIC. The ROIC was found to operate stably over a wide temperature range.
장정문,공성호,윤홍만,안혜성,이혁준,윤원재,김상균,양한광,이건욱,Jang, Jeong-Moon,Kong, Seong-Ho,Yoon, Hong-Man,Ahn, Hye-Seong,Lee, Hyuk-Joon,Yoon, Won-Jae,Kim, Sang-Kyoon,Yang, Han-Kwang,Lee, Kuhn-Uk 대한위암학회 2009 대한위암학회지 Vol.9 No.4
목적: 위 유암종의 임상병리학적 특성과 치료방법 및 예후 등을 분석하였다. 대상 및 방법: 1996년부터 2006년까지 본원에서 치료받았던 18명을 대상으로, 의무기록을 이용한 후향적 연구를 통해 Rindi 분류에 의해 구분하여, 기존의 보고와 임상병리학적 특성 및 치료, 생존율을 비교 분석하였다. 결과: Type I은 8명, type III가 10명이었으며 type II는 없었다. 평균발생 연령은 type I이 47.75세, type III는 57.90세였고, type I은 남자 4명, 여자 4명으로 성비가 1:1이었으나 type III는 남자 7명, 여자 3 명으로 남자에서 많았다. Type I에서도 단발성인 경우가 4예가 있었으며, 1예를 제외하고는 점막 또는 점막하층에 국한되어 있고, 림프절 전이나 원격전이는 없었다. Type III는 병변의 침습성에 관계없이 모두 국소림프절 전이 또는 원격 전이가 있었다. 진단 시 원격전이가 없었던 13명 중 5예에서 내시경적 절제술, 8예에선 수술이 시행되었으며 5년 생존율은 92.3%였다. 원격 전이가 있었던 5예는 평균 생존 기간이 22개월로 이 중 고식적 수술을 시행 받은 3예의 중위 생존 기간은 24개월이었다(95%, ${\pm}6.52$). 결론: 기존의 Rindi 분류법과 비교하여 보았을 때, 본 연구 결과 빈도에 있어서 type III가 type I보다 흔하였다. 또한 type I 유암종에 있어서 평균연령이 낮고, 단발성 종양이 절반 정도를 차지하며, 악성빈혈이 동반되지 않았던 점 등에서 서구와는 다른 특징이 관찰되었다. Purpose: We wanted to analyze the clinicopathologic characteristics of patients with gastric carcinoid tumor, which is a rare gastric tumor (less than 2% of all gastric tumors). Materials and Methods: We reviewed all the carcinoid patients who were treated from 1996 to 2006. The clinicopathologic characteristics, the treatment modalities and the survival rates were retrospectively analysed. Results: There were 8 type I patients and 10 type III patients, but there were no type II patients. The mean age of onset for type I was 47.75 years and that for type III was 57.90 years. More type III patients were female, but the gender ratio of type I patients was equal at a ratio of 1:1. There were 4 cases of solitary tumor, which were all T1 except for one case, and there was neither distant metastasis nor lymph node involvement for the type T1 cases. In the 13 patients who had no metastasis, 5 underwent endoscopic mucosal resection and 8 underwent surgery, and their combined 5 year survival rate was 92.3%. For the 5 cases who had metastastses, their mean survival was 22 months and especially, 3 of them underwent palliative surgery and their median survival were 24 months (95%, ${\pm}6.52$). Conclusion: Higher incidence of type III gastric carcinoid tumor and less multiplicity in type I gastric tumor were identified in our study compared with previous reports. For the type III cases, there were some noteable differences compared with the Western country's survival rate for the patients who underwent palliative surgery, so physicians must pay close attention to the definite clinicopathologic characteristics of gastric carcinoid patients.
진단 후 78개월 뒤에 근치적으로 절제된 진행위암 1예
손해정,유문원,공성호,안혜성,이인규,김우호,이혁준,양한광,Son, Hae-Jung,Yoo, Moon-Won,Kong, Seong-Ho,Ahn, Hye-Seong,Lee, In-Kyu,Kim, Woo-Ho,Lee, Hyuk-Joon,Yang, Han-Kwang 대한위암학회 2010 대한위암학회지 Vol.10 No.1
The natural history of gastric cancer is unclear. We report here on a rare case of advanced gastric cancer for which we performed curative gastrectomy 78 months after the diagnosis. A 74-year-old woman with epigastric pain underwent esophagogastroscopy in January, 2000 and she was diagnosed with advanced gastric cancer. Suspicious omental cake was noted on CT. After refusing all kinds of treatment, she underwent a follow up CT scan on September, 2002, which no longer suggested omental cake. She once again refused treatment, but she visited the hospital in June, 2006 due to severe epigastric pain and a decreased oral intake. Abdominal CT showed no distant metastasis, and so radical subtotal gastrectomy with regional lymph node dissection was performed in July, 2006 and the TNM stage was T2bN1M0 (stage II). 위암의 자연사는 불분명하다. 이에 저자들은 진행위암으로 진단받은 후 78개월 동안 치료 없이 지내다 수술 후 II기로 진단받은 1예를 경험하였기에 보고한다. 대상 환자는 74세 여자로 2000년 1월 상복부 통증으로 시행한 내시경 검사에서 전정부에 진행위암이 진단되었고 복부 전산화단층촬영(CT)에서 그물막 전이소견이 의심되었다. 이후 치료 없이 지내던 환자가 재평가를 원하여 2002년 9월에 시행한 복부CT에서 그물막 전이로 보였던 병변이 보이지 않았다. 이후에도 치료를 받지 않았고 2006년 6월에 식사량이 줄어 시행한 복부 CT에서 원격전이는 보이지 않았다. 2006년 7월 근치적 위아전절제술을 시행하였고 병기는 T2bN1M0로 II기였다.
Electrochemical etching을 이용한 P형 실리콘에서의 nano pillar arrays 형성
류한희(Han Hee Ryu),공성호(Seong Ho Kong),김재현(Jae Hyun Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
The process conditions for fabricating p-type silicon pillars were optimized by controlling current density, bath temperature. To get best process flexibility for pillar arrays formation, three factors affecting pillar formation were changed. First, the solution bath was designed to keep constant temperature during the experiment irrespective of external temperature. Second, the counter Pt electrode was changed from rod type to mesh to obtain uniform distribution of current density. Third, Cr-Cu alloy electrode instead of Cu was used to increase electrode current density.